經(jīng)常在各大論壇或新聞板塊詳情頁(yè)面下邊看到評(píng)論功能，當(dāng)然不單單是直接發(fā)表評(píng)論內(nèi)容那么簡(jiǎn)單，可以對(duì)別人的評(píng)論進(jìn)行回復(fù)，別人又可以對(duì)你的回復(fù)再次評(píng)論或回復(fù)，如此反復(fù)，理論上可以說(shuō)是沒(méi)有休止，從技術(shù)角度分析很容易想到運(yùn)用無(wú)限級(jí)分類(lèi)技術(shù)存儲(chǔ)數(shù)據(jù)，運(yùn)用遞歸獲取評(píng)論層級(jí)結(jié)構(gòu)數(shù)據(jù)，運(yùn)用ajax實(shí)現(xiàn)評(píng)論頁(yè)面交互，這里用thinkphp框架做個(gè)簡(jiǎn)單的demo練練手，為了簡(jiǎn)化流程這里第三級(jí)評(píng)論開(kāi)始停止回復(fù)，當(dāng)然只要在這個(gè)基礎(chǔ)上稍作修改就可以實(shí)現(xiàn)無(wú)限回復(fù)功能，主要是view層樣式修改較麻煩，需花些時(shí)間。
一、效果需求分析:
1.在頭部可以直接發(fā)布一級(jí)評(píng)論,最新發(fā)表的評(píng)論顯示在最上面,如下效果圖
2.對(duì)發(fā)表的評(píng)論可以回復(fù)，回復(fù)顯示在上級(jí)評(píng)論下邊，形成層級(jí)關(guān)系，如下效果圖
3.頁(yè)面操作細(xì)節(jié):點(diǎn)擊某個(gè)評(píng)論的回復(fù)按鈕時(shí)，顯示回復(fù)文本輸入框，同時(shí)其他評(píng)論的回復(fù)文本輸入框消失，當(dāng)再次點(diǎn)擊該回復(fù)按鈕時(shí)，該文本框消失
4.在最后一級(jí)評(píng)論(這里設(shè)置是第三級(jí))關(guān)閉回復(fù)功能
5.即時(shí)顯示評(píng)論總數(shù)
二、實(shí)現(xiàn)思路及細(xì)節(jié)
1.數(shù)據(jù)表設(shè)計(jì)
2.controller層關(guān)鍵函數(shù):
(1). 遞歸獲取評(píng)論列表
/***遞歸獲取評(píng)論列表 */ protected function getCommlist($parent_id = 0,&$result = array()){ $arr = M('comment')->where("parent_id = '".$parent_id."'")->order("create_time desc")->select(); if(empty($arr)){ return array(); } foreach ($arr as $cm) { $thisArr=&$result[]; $cm["children"] = $this->getCommlist($cm["id"],$thisArr); $thisArr = $cm; } return $result; }(2). 展示評(píng)論頁(yè)面的action
public function index(){ $num = M('comment')->count(); //獲取評(píng)論總數(shù) $this->assign('num',$num); $data=array(); $data=$this->getCommlist();//獲取評(píng)論列表 $this->assign("commlist",$data); $this->display('index'); }(3).評(píng)論頁(yè)面ajax訪問(wèn)添加評(píng)論的action
/***添加評(píng)論 */ public function addComment(){ $data=array(); if((isset($_POST["comment"]))&&(!empty($_POST["comment"]))){ $cm = json_decode($_POST["comment"],true);//通過(guò)第二個(gè)參數(shù)true，將json字符串轉(zhuǎn)化為鍵值對(duì)數(shù)組 $cm['create_time']=date('Y-m-d H:i:s',time()); $newcm = M('comment'); $id = $newcm->add($cm); $cm["id"] = $id; $data = $cm; $num = M('comment')->count();//統(tǒng)計(jì)評(píng)論總數(shù) $data['num']= $num; }else{ $data["error"] = "0"; } echo json_encode($data); }3.view層實(shí)現(xiàn)
(1). 展示頁(yè)面的整體結(jié)構(gòu)設(shè)計(jì)
實(shí)際效果:
頁(yè)面html代碼:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html lang="en"><head> <meta http-equiv="Content-Type" content="text/html;charset=UTF-8"> <title>php無(wú)限級(jí)分類(lèi)實(shí)戰(zhàn)————評(píng)論及回復(fù)功能</title> <link rel="stylesheet" type="text/css" href="/Public/css/comment.css" rel="external nofollow" > <script type="text/javascript" src="/Public/js/jquery-1.11.3.min.js" ></script> <script type="text/javascript" src="/Public/js/comment.js" ></script></head><body><div class="comment-filed"> <!--發(fā)表評(píng)論區(qū)begin--> <div> <div class="comment-num"> <span>{$num}條評(píng)論</span> </div> <div> <div> <textarea class="txt-commit" replyid="0"></textarea> </div> <div class="div-txt-submit"> <a class="comment-submit" parent_id="0" style="" href="javascript:void(0);" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" ><span style=''>發(fā)表評(píng)論</span></a> </div> </div> </div> <!--發(fā)表評(píng)論區(qū)end--> <!--評(píng)論列表顯示區(qū)begin--> <!-- {$commentlist} --> <div class="comment-filed-list" > <div><span>全部評(píng)論</span></div> <div class="comment-list" > <!--一級(jí)評(píng)論列表begin--> <ul class="comment-ul"> <volist name="commlist" id="data"> <li comment_id="{$data.id}"> <div > <div> <img class="head-pic" src="{$data.head_pic}" </div> <div class="cm"> <div class="cm-header"> <span>{$data.nickname}</span> <span>{$data.create_time}</span> </div> <div class="cm-content"> <p> {$data.content} </p> </div> <div class="cm-footer"> <a class="comment-reply" comment_id="{$data.id}" href="javascript:void(0);" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >回復(fù)</a> </div> </div> </div> <!--二級(jí)評(píng)論begin--> <ul class="children"> <volist name="data.children" id="child" > <li comment_id="{$child.id}"> <div > <div> <img class="head-pic" src="{$child.head_pic}" </div> <div class="children-cm"> <div class="cm-header"> <span>{$child.nickname}</span> <span>{$child.create_time}</span> </div> <div class="cm-content"> <p> {$child.content} </p> </div> <div class="cm-footer"> <a class="comment-reply" replyswitch="off" comment_id="{$child.id}" href="javascript:void(0);" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >回復(fù)</a> </div> </div> </div> <!--三級(jí)評(píng)論begin--> <ul class="children"> <volist name="child.children" id="grandson" > <li comment_id="{$grandson.id}"> <div > <div> <img class="head-pic" src="{$grandson.head_pic}" </div> <div class="children-cm"> <div class="cm-header"> <span>{$grandson.nickname}</span> <span>{$grandson.create_time}</span> </div> <div class="cm-content"> <p> {$grandson.content} </p> </div> <div class="cm-footer"> <!-- <a class="comment-reply" comment_id="1" href="javascript:void(0);" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >回復(fù)</a> --> </div> </div> </div> </li> </volist> </ul> <!--三級(jí)評(píng)論end--> </li> </volist> </ul> <!--二級(jí)評(píng)論end--> </li> </volist> </ul> <!--一級(jí)評(píng)論列表end--> </div> </div> <!--評(píng)論列表顯示區(qū)end--></div> </body></html>(2). 單個(gè)評(píng)論信息div結(jié)構(gòu)代碼
<div > <div> <img class="head-pic" src="{$data.head_pic}" </div> <div class="cm"> <div class="cm-header"> <span>{$data.nickname}</span> <span>{$data.create_time}</span> </div> <div class="cm-content"> <p> {$data.content} </p> </div> <div class="cm-footer"> <a class="comment-reply" comment_id="{$data.id}" href="javascript:void(0);" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >回復(fù)</a> </div> </div> </div>對(duì)應(yīng)的效果圖:
對(duì)應(yīng)的css代碼:
.head-pic{ width:40px; height:40px; }.cm{ position:relative; top:0px; left:40px; top:-40px; width:600px;}.cm-header{ padding-left:5px;}.cm-content{ padding-left:5px;}.cm-footer{ padding-bottom:15px; text-align:right; border-bottom: 1px dotted #CCC;}.comment-reply{ text-decoration:none; color:gray; font-size: 14px;}4. JS代碼
(1). 提交評(píng)論:提交評(píng)論的a標(biāo)簽按鈕引用了樣式comment-submit，在其點(diǎn)擊事件中進(jìn)行ajax操作
$('body').delegate('.comment-submit','click',function(){ var content = $.trim($(this).parent().prev().children("textarea").val());//根據(jù)布局結(jié)構(gòu)獲取當(dāng)前評(píng)論內(nèi)容 $(this).parent().prev().children("textarea").val("");//獲取完內(nèi)容后清空輸入框 if(""==content){ alert("評(píng)論內(nèi)容不能為空!"); }else{ var cmdata = new Object(); cmdata.parent_id = $(this).attr("parent_id");//上級(jí)評(píng)論id cmdata.content = content; cmdata.nickname = "游客";//測(cè)試用數(shù)據(jù) cmdata.head_pic = "/Public/images/default.jpg";//測(cè)試用數(shù)據(jù) var replyswitch = $(this).attr("replyswitch");//獲取回復(fù)開(kāi)關(guān)鎖屬性 $.ajax({ type:"POST", url:"/index.php/home/index/addComment", data:{ comment:JSON.stringify(cmdata) }, dataType:"json", success:function(data){ if(typeof(data.error)=="undefined"){ $(".comment-reply").next().remove();//刪除已存在的所有回復(fù)div //更新評(píng)論總數(shù) $(".comment-num").children("span").html(data.num+"條評(píng)論"); //顯示新增評(píng)論 var newli = ""; if(cmdata.parent_id == "0"){ //發(fā)表的是一級(jí)評(píng)論時(shí)，添加到一級(jí)ul列表中 newli = "<li comment_id='"+data.id+"'><div ><div><img class='head-pic' src='"+data.head_pic+"' $(".comment-ul").prepend(newli); }else{ //否則添加到對(duì)應(yīng)的孩子ul列表中 if('off'==replyswitch){//檢驗(yàn)出回復(fù)關(guān)閉鎖存在，即三級(jí)評(píng)論不再提供回復(fù)功能 newli = "<li comment_id='"+data.id+"'><div ><div><img class='head-pic' src='"+data.head_pic+"' }else{//二級(jí)評(píng)論的回復(fù)按鈕要添加回復(fù)關(guān)閉鎖屬性 newli = "<li comment_id='"+data.id+"'><div ><div><img class='head-pic' src='"+data.head_pic+"' } $("li[comment_id='"+data.parent_id+"']").children("ul").prepend(newli); } }else{ //有錯(cuò)誤信息 alert(data.error); } } }); } });(2).回復(fù)評(píng)論:回復(fù)評(píng)論的a標(biāo)簽按鈕引用了樣式comment-reply，在其點(diǎn)擊事件中進(jìn)行顯示或隱藏評(píng)論輸入框的操作
//點(diǎn)擊"回復(fù)"按鈕顯示或隱藏回復(fù)輸入框 $("body").delegate(".comment-reply","click",function(){ if($(this).next().length>0){//判斷出回復(fù)div已經(jīng)存在,去除掉 $(this).next().remove(); }else{//添加回復(fù)div $(".comment-reply").next().remove();//刪除已存在的所有回復(fù)div //添加當(dāng)前回復(fù)div var parent_id = $(this).attr("comment_id");//要回復(fù)的評(píng)論id var divhtml = ""; if('off'==$(this).attr("replyswitch")){//二級(jí)評(píng)論回復(fù)后三級(jí)評(píng)論不再提供回復(fù)功能,將關(guān)閉屬性附加到"提交回復(fù)"按鈕" divhtml = "<div class='div-reply-txt' style='width:98%;padding:3px;' replyid='2'><div><textarea class='txt-reply' replyid='2' style='width: 100%; height: 60px;'></textarea></div><div style='margin-top:5px;text-align:right;'><a class='comment-submit' parent_id='"+parent_id+"' style='font-size:14px;text-decoration:none;background-color:#63B8FF;' href='javascript:void(0);' replyswitch='off' >提交回復(fù)</a></div></div>"; }else{ divhtml = "<div class='div-reply-txt' style='width:98%;padding:3px;' replyid='2'><div><textarea class='txt-reply' replyid='2' style='width: 100%; height: 60px;'></textarea></div><div style='margin-top:5px;text-align:right;'><a class='comment-submit' parent_id='"+parent_id+"' style='font-size:14px;text-decoration:none;background-color:#63B8FF;' href='javascript:void(0);'>提交回復(fù)</a></div></div>"; } $(this).after(divhtml); } });三、完整代碼免費(fèi)下載
php無(wú)限級(jí)分類(lèi)實(shí)現(xiàn)評(píng)論及回復(fù)
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